/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/GameplayEffectTypes.h
Set the specified tag count to a specific value
True if tag waseitheradded or removed. (E.g., we had the tag and now dont. or didnt have the tag and now we do. We didn't just change the count (1 count -> 2 count would return false).
bool SetTagCount ( const [FGameplayTag](API\Runtime\GameplayTags\FGameplayTag) & Tag, int32 NewCount )